If a friend likes to have sex with a girl, then this is quite normal and correct. Now imagine that there is another girl in the guys place, and for this couple, such sex is also quite normal. And even if neither one has an oblong object of love and pride between the legs - this does not bother them at all and their love affair is quite at the level. Well, experience in such matters comes over time, and apparently this couple of lesbians is far from the first time.
